L5030G-AF5-R [UTC]
BOOST-UP VOLTAGE CONVERTER FOR LED DRIVER; 升压后的电压转换器用于LED驱动器
| 型号： | L5030G-AF5-R |
| 厂家： | 
Unisonic Technologies |
| 描述： | BOOST-UP VOLTAGE CONVERTER FOR LED DRIVER |
| 文件： | 总6页 (文件大小：198K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
L5030
LINEAR INTEGRATED CIRCUIT
BOOST-UP VOLTAGE
CONVERTER FOR LED
DRIVER
DESCRIPTION
The L5030 is a high efficiency boost converter operating in
current loop, based on a PFM mode to drive LEDs. The
current mode regulation allows the uniform brightness of
LEDs. The wide application of L5030 makes it suitable for
many types of battery applications such as Li-ions, Alkaline,
or Sealed Lead Acid battery. The combination of few external
components and small package size keeps the converter
board area to a minimum in space-restricted applications.
FEATURES
* Inductor based converter brings up to 92% efficiency
* +0.8V to +8.0V input voltage range
* 0.92V guaranteed start up input voltage
* Boost up control using PFM
* Constant output current regulation
ORDERING INFORMATION
Ordering Number
Lead Free
Package
SOT-25
Packing
Halogen Free
L5030L-AF5-R
L5030G-AF5-R
Tape Reel
www.unisonic.com.tw
Copyright © 2011 Unisonic Technologies Co., Ltd
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L5030
LINEAR INTEGRATED CIRCUIT
MARKING
PIN DESCRIPTIONS
PIN NO.
SYMBOL
VCC
I/O
DESCRIPTION
1
2
3
4
Supply voltage
Ground
GND
NC
No connection
Current sense input
ISENSE
I
Output drive for external switching transistor. Connected to the base of external
switching transistor.
5
VDRIVE
O
BLOCK DIAGRAM
19mV
VREF
VDRIVE
+
-
ON/OFF Time
Q
S
R
Control
ISENSE
Driver
Oscillator
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L5030
LINEAR INTEGRATED CIRCUIT
DEVICE DESCRIPTION
The UTC L5030 is designed to supply a constant current to the external load, the circuit be powered a battery
supply. An external transistor is required for LED application. The UTC L5030 guarantees the start up voltage as low
as 0.92V and remains operation down to 0.8V.
The basic structure of UTC L5030 is a step-up DC/DC converter. It offers a Pulse Frequency Modulation (PFM)
operation, which controls the constant OFF time (1.7μs typically) for external transistor at the 200KHz maximum
frequency.
The external switching transistor is ON and kept on until the voltage across the current-sense resistor which is
connected in series with the emitter of the switching transistor exceeds the ISENSE input threshold (19mV). The
transistor is shut OFF and the energy stored in inductor is discharged when ISENSE input threshold exceeds 19mV.
Once the discharge cycle is completed, the external transistor is ON again. This charging and discharging sequence
will repeat and trigger the external transistor regardless the inductor current value.
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L5030
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS (TA = 25℃, unless otherwise specified)
PARAMETER
SYMBOL
VCC
RATINGS
-0.3 ~ 10
UNIT
V
Supply Voltage
Input Voltage
-0.3 ~ VCC+0.3
450
V
Power Dissipation
PD
mW
°C
Operating Temperature
Storage Temperature
TOPR
TSTG
-40 ~ +85
-55 ~ +125
°C
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
ELECTRICAL CHARACTERISTICS (VCC=1.5V)
PARAMETER SYMBOL TEST CONDITIONS
DC PARAMETERS (TA=25°C, unless otherwise specified.)
MIN
0.8
TYP MAX UNITS
Recommended Supply Voltage
Minimum Startup Voltage
VCC
8
V
V
VSU(MIN) IDRIVE=-600μA, VDRIVE=0.7V
0.8
0.92
VCC
0.25
24
High
Low
VISENSE = 0V, IVDRIVE =-0.5mA
VVDRIVE
VCC-0.3
V
Drive Voltage
VISENSE = 50mV, IVDRIVE = 5mA
0
V
ISENSE Threshold Voltage
Efficiency(Note 1)
VISENSE
14
19
88
mV
%
η
92
Quiescent Current(Note 2)
VDRIVE Output Current
Supply Current(Note 3)
ISENSE Voltage Temp Co.(Note 2)
ISENSE Input Current
IQ
0.2
mA
mA
mA
%/°C
μA
IVDRIVE
ICC
TCVISENSE
IISENSE
VDRIVE = 0.7V, VISENSE = 0V
VDRIVE = 0.7V, VISENSE =0V
1.5
2
3.6
4
0.4
-30
VISENSE = 0V
0
-65
AC PARAMETERS(Note 2) (TA = 0 ~ 70°C, unless otherwise specified)
Discharge Pulse Width
TDRV
FOSC
1.2
1.7
3.2
μs
PFM Operating Frequency (Note 4)
350
kHz
Note 1. The application dependent, please see reference designs.
2. These parameters are guaranteed by design.
3. See typical characteristics. The total supply current =IQ + IVDRIVE
,
4. See applications section. Operating frequency is application circuit dependent.
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L5030
LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION CIRCUITS
The UTC L5030 provides portable and multiple LEDs applications.
Solution for portable application
Solution for multiple LEDs application
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L5030
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS
Quiescent Current vs. Input Voltage
Drive Current vs. Input Voltage
4m
300μ
200μ
3m
2m
100μ
1m
0
0
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
Input Voltage (V)
Input Voltage (V)
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
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